A fourth raged: "Even by British standards, 16 years for a psychotic murder is shocking and pathetic #murdercase."

"So he brutally murdered someone, took pictures of it on his phone, bragged about it and in 16 years he'll be walking/living amongst us again," tweeted a fifth, adding: "This is why we need to bring back the death sentence. #murdercase."

So he brutally murdered someone, took pictures of it on his phone, bragged about it and in 16 years he’ll be walking/living amongst us again. This is why we need to bring back the death sentence. #murdercase